Prepare an aspirator (especially for emergency patients with satiety and craniocerebral trauma, etc.). ), and be prepared to suck sputum and stomach contents at any time. Prepare intubation instruments, guide wires, stethoscopes, etc. Evaluate the difficulty of intubation, and those with high glottis can help to press thyroid cartilage. If the guide wire is used for intubation, it should be pulled out in time to avoid the tube from coming out. Insert a tube to inflate the cuff. Help to determine whether the intubation is too deep or too shallow, listen to the breathing sound with a stethoscope and adjust it. Assist in fixing the catheter, and the anesthesia machine is controlled by the machine.